At your age, if you cleaned up your diet, you would get the best results. You all ready have all the testosterone there, and if your workouts are solid, then just get your eating right and you'll see that extra 5-10 pounds you're looking for. How much protein are you getting in a day? Try and be at atleast 1.5x your body weight. So you'd want to get to 300g daily at least. Jelly is made with a LOT of sugar, which isn't helping you. If you're going to keep PB&J in your diet, clean it up and go with Natural PB and a natural fruit spread with no sugar added. It should make a pretty solid difference. Try and get your protein from whole foods like eggs, chicken, turkey, lean pork and beef, and before bed make sure you get some Casein protein in your system to absorb slowly as you sleep. Either through a powder or about a cup of cottage cheese right before you go to sleep. Make these changes and you'll definitely see results.